Hailey Bieber is such a proud mom! She shared a milestone moment in son Jack Blues Bieber’s life with fans in a rare photo of the child she shares with husband Justin Bieber.

“My sweet baby is 9 months old today,” Hailey, 28, wrote on a Thursday, May 22, Instagram Story photo showing a black and white picture of her son, Jack, who was born in Los Angeles on August 22, 2024.

The Rhode Skin founder added a teary emoji, showing how moved she was that her son is growing up so quickly.

Jack was seen sitting up on his own while turned away from the camera. He was dressed in a little white T-shirt and jeans while going barefoot, seeming fascinated by an object on his lap.

While Hailey and Justin, 31, have been careful not to show their son’s face in photos, they frequently share updates about him on social media.

The new snapshot comes after the model opened up about motherhood in Vogue‘s Summer Issue.

In an interview published on Tuesday, May 20, Hailey said of her son, “He’s my priority. He is the most important thing to me.”

She called motherhood her “biggest teacher so far “and explained how it changed her relationship with Justin, saying it is “the biggest teacher in my relationship. You see your partner so differently.”

While calling Justin an amazing dad and a “natural,” Hailey shared, “I think you empathize with your parents a lot more. There’s so much perspective that comes with it,” about being a mom.

“I like who I am so much more than I ever have,” she told the publication. “There’s an ease that comes with [being a mother], a confidence. You really start to give less of a f–k about so many things. You’re just like, ‘I don’t have the time, actually. I don’t have the energy.’”

The Arizona native explained why she and Justin have had limited family outings with Jack while making Los Angeles their home base.

“We don’t take him to a lot of places. We don’t want anyone to … I mean, you’ve just got to see how invasive it all is. It feels mean to put a baby into that,” Hailey said about the constant paparazzi presence around herself and the “Holy” singer.

The model revealed how her body changed after giving birth to Jack, as she struggled to lose the final 15 pounds she gained during her pregnancy.

“When people talk about ‘bouncing back’ — ​back where, because my hips are wider, my boobs are actually bigger than they were before. They did not go back. And great, I’ll take it, but it’s not the same body that it was before,” she revealed. “You’re not the same person that you were before. You change head to toe. And I think there was a minute where I kept really hyper-​fixating on getting back to what I was. And then I had to go through that acceptance of, I’m not going back. So, it’s really about how do I want to move forward? Who do I want to be?”

Hailey also confessed she was able to lose the remaining weight with the help of a team of experts who focused on everything from spinal and core realignment to her pelvic floor.